Appendix F. Additional Replication High Availability Configuration Elements

check-for-active-server

Embedded broker coordination

Applies only to brokers configured as primary brokers. Specifies whether the original primary broker checks the cluster for another active broker using its own server ID when starting up. Set to true to fail back to the original primary broker and avoid a "split brain" situation in which two brokers become active at the same time. The default value of this property is false.

cluster-name

Embedded broker and ZooKeeper coordination

Name of the cluster configuration to use for replication. This setting is only necessary if you configure multiple cluster connections. If configured, the cluster configuration with this name will be used when connecting to the cluster. If unset, the first cluster connection defined in the configuration is used.

initial-replication-sync-timeout

Embedded broker and ZooKeeper coordination

The amount of time the replicating broker will wait upon completion of the initial replication process for the replica to acknowledge that it has received all the necessary data. The default value of this property is 30,000 milliseconds.

NOTE: During this interval, any other journal-related operations are blocked.

max-saved-replicated-journals-size

Embedded broker and ZooKeeper coordination

Applies to backup brokers only. Specifies how many backup journal files the backup broker retains. Once this value has been reached, the broker makes space for each new backup journal file by deleting the oldest journal file. The default value of this property is 2.